<template>
  <div>
     <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>角色管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row class="vcenter" :class="['bdbottom',i1 === 0 ? 'bdtop' : '']"
             v-for="(item1,i1) in scope.row.children" :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环嵌套渲染二级权限 -->
                <el-row class="vcenter" :class="[i2 === 0 ? '' : 'bdtop']" v-for="(item2,i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success"
                    closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="13">
                    <el-tag typewarning v-for="(item3,i3) in item2.children" :key="item3.id"
                    closable @close="removeRightById(scope.row,item3.id)">
                      {{item3.authName}}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <pre>
              <!-- {{scope.row}} -->
            </pre>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
            <el-button @click="showSetRightDialog(scope.row)" size="mini" type="warning" icon="el-icon-setting">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 分配权限的对话框 -->
    <el-dialog
      title="提示" :visible.sync="SetRightDialogVisible" width="50%"
      @close="SetRightDialogClosed">
      <!-- 树型控件 -->
      <el-tree :data="rigthslist" :props="treeProps" show-checkbox
      node-key="id" default-expand-all :default-checked-keys="defKeys"
      ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="SetRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data(){
    return{
      //所有角色列表数据
      rolelist:[],
      //控制分配权限对话框的的显示与隐藏
      SetRightDialogVisible:false,
      //所有权限的数据
      rigthslist:[],
      //树形控件的属性绑定对象
      treeProps:{
        label:'authName',
        children:'children'
      },
      //默认选中的id节点的值
      defKeys:[],
      //当前即将分配权限的角色id
      roleId:''
    }
  },
  created(){
    this.getRolesList()
  },
  methods:{
    //获取所有角色的列表
    async getRolesList(){
      const {data:res} = await this.$http.get('roles')
      if(res.meta.status !== 200){
        return this.$message.error('获取角色列表失败！')
      }

      this.rolelist = res.data
      console.log(this.rolelist)
    },
    //根据id删除对应的权限
    async removeRightById(role,rightId){
      //弹框提示用户是否要删除
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)

        if(confirmResult !== 'confirm'){
          return this.$message.info('取消了删除！')
        }
        //console.log('确认了删除')
        const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
        if(res.meta.status !== 200){
          return this.$message.error('删除权限失败！')
        }
        //this.getRolesList()
        role.children = res.data
    },
    //展示分配权限的对话框
    async showSetRightDialog(role){
      //获取所有权限的数据
      const {data:res} = await this.$http.get('rights/tree')
      if(res.meta.status !== 200){
        return this.$message.error('获取权限数据失败！')
      }
      //把获取到的权限数据保存到data中
      this.rightslist = res.data
      console.log(this.rigthslist)

      //递归获取三级节点的id
      this.getLeafKeys(role,this.defKeys)

      this.SetRightDialogVisible = true
    },
    //通过递归的形式，获取角色下所有三级权限的id，并保存到defKeys数组中
    getLeafKeys(node,arr){
      //如果当前node节点不包含chidren属性，则是三级节点
      if(!node.childeren){
        return arr.push(node.id)
      }

      node.childeren.forEach(item => 
      this.getLeafKeys(item,arr))  
    },
    //监听分配权限对话框的关闭事件
    SetRightDialogClosed(){
      this.defKeys = []
    },
    //点击为角色分配权限
    async allotRights(){
      const keys = [
        ...this.$refs.treeRef.
        getCheckedKeys(),
        ...this.$refs.treeRef.
        getHaldCheckedKeys()
      ]

      const idStr = keys.join(',')

      const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
      if(res.meta.status !==200){
        return this.$message.error('分配权限失败！')
      }

      this.$$message.success('分配权限成功！')
      this.getRolesList()
      this.SetRightDialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
  .el-tag{
    margin: 7px;
  }

  .bdtop{
    border-top: 1px solid #eee;
  }

  .bdbottom{
    border-bottom: 1px solid #eee;
  }

  .vcenter{
    display: flex;
    align-items: center;
  }
</style>